Tetraethyl Lead (TEL) is added to petrol to
(A) Prevent freezing
(B) Increase boiling point
(C) Increase flash point
(D) Increase anti knocking rating
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A child is given ?triple antigens? within one year of birth. Why ? (1) To prevent diphtheria, tetanus and whooping cough (2) To prevent smallpox, malaria and filarial (3) To cure Diphtheria (4) All the above
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When returning to the earth, spacecraft has a communication blackout. The reason is: (A) The returning spacecraft is doing so against the force of gravity, which inter-feres with the radio waves (B) During the re-entry period, the density of the plasma, generated by the intense frictional heat, is so high that the operational frequencies used for communication be come very much less than the plasma cut-off frequency, resulting in a total blackout (C) Stellar X-rays attract and absorb the sound waves (D) None of the above
Who is the Founder of NIACL?
As per the recent reports in the newspapers, the Prime Minister of Portugal, Jose Manuel Durao Barroso is likely to be the next President of the European Commission. Who among the following is the President of the EC at present? 1 Jacques Chirac 2 Tony Blair 3 George Sampaio 4 None of these
Gypsum is added to cement clinker to 1 Increase the tensile strength of cement 2 Bind the particles of calcium silicate 3 Decrease the rate of setting of cement 4 Facilitate the formation of colloidal gel